POST UTME ABU 2020 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A plant with the genotype 'Rr' is crossed with a plant with the genotype 'RR'. What is the probability that the offspring will have the genotype 'Rr'?
A. 1/4
B. 1/2
C. 3/4
D. 1
Question 2
The study of the structure, behavior, and evolution of the universe is called
A. \cosmo\logy
B. astrophysics
C. geo\logy
D. meteoro\logy
Question 3
A cell is composed of various organelles that perform different functions. What is the term for the membrane-bound organelle responsible for protein synthesis?
A. Mitochondria
B. Chloroplast
C. Endoplasmic reticulum
D. Ribosome
Question 4
A study on the genetic variation of a population found that the frequency of the recessive allele 'a' is 0.2. If the population size is 1000, what is the expected number of homozygous recessive individuals?
A. 200
B. 400
C. 600
D. 800
Question 5
The process by which an organism's genetic information is passed from one generation to the next is called
A. mutation
B. gene expression
C. heredity
D. epigenetics
Question 6
In the context of cell division, what is the primary function of the centrioles during the prophase stage of mitosis?
A. To form the spindle fibers
B. To replicate the DNA
C. To condense the chromosomes
D. To form the nuclear envelope
Question 7
The type of connective tissue that forms the majority of the body's support structure is known as?
A. Bone Tissue
B. Cartilage Tissue
C. Ligament Tissue
D. T\endon Tissue
Question 8
A population of rabbits is introduced to a new island. Initially, the population grows exponentially, but eventually, it reaches a carrying capacity. What is the primary factor limiting the population growth?
A. Predation by native predators
B. Competition for resources such as food and water
C. Disease transmission among the rabbit population
D. Genetic drift due to random events
Question 9
A diagram of a cell membrane is shown below. Identify the structure labeled 'A'.
A. Phospholipid bilayer
B. Integral protein
C. Channel protein
D. Receptor protein
Question 10
A researcher is studying the effect of pH on the growth of E. coli bacteria. The researcher finds that the bacteria grow best at a pH of 7.5. However, the bacteria are unable to grow at a pH of 5.5. What is the likely reason for this?
A. The bacteria are unable to produce the enzymes necessary for growth at a pH of 5.5.
B. The bacteria are unable to survive at a pH of 5.5 due to the presence of toxic compounds.
C. The bacteria are unable to grow at a pH of 5.5 due to the lack of essential nutrients.
D. The bacteria are unable to grow at a pH of 5.5 due to the presence of competing microorganisms.
Question 11
A diagram of a human eye is shown below. Which of the following parts of the eye is responsible for detecting light?
A. Cornea
B. Iris
C. Retina
D. Lens
Question 12
The process by which the body's cells obtain the nutrients they need is known as?
A. Digestion
B. Absorption
C. Assimilation
D. Excretion
Question 13
A diagram of the human eye is shown below. What is the function of the part labeled 'A'?
A. To focus light on the retina
B. To detect movement
C. To regulate pupil size
D. To produce tears
Question 14
A cell is placed in a solution with a high concentration of glu\cose. What will happen to the cell's membrane potential?
A. It will become more negative
B. It will become more positive
C. It will remain the same
D. It will become zero
Question 15
The process by which an organism's genetic information is altered due to environmental factors is called
A. mutation
B. gene expression
C. epigenetics
D. genetic drift

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